10µA Quiescent Current Step-Down Regulators Extend Standby Time in Handheld Products:  DN235 -  Design Notes (Linear Technology) (app note added 1/06)

3A 2MHz Monolithic Synchronous Step-Down Regulator Provides a Compact Solution for DDR Memory Termination:  DN309 -  Design Notes (Linear Technology) (app note added 6/06)

Add an auxiliary Voltage to a Buck regulator:  10/31/02 EDN Design Ideas  /  (added 1/05)  You often need more than one regulated output voltage in a system. A frequently used and reasonably simple way to create this auxiliary output voltage is to add a second winding to the output inductor, creating a coupled inductor or a transformer, followed by a diode to rectify (peak-detect) this output voltage....

AN-1144: Maximizing Start-Up Loads with the LM3352 Regulated Buck/Boost Switched Capacitor Converter:  National Semiconductor Application Note 27 Mar2000 (app note added 7/02)

AN-1157: Positive to Negative Buck/Boost Converter using LM267X SIMPLE SWITCHER® Regulators:  National Semiconductor Application Note 27 Mar2000 (app note added 7/02)

AN-1198: LM2622 Step-Up DC/DC Converter Evaluation Board:  National Semiconductor - Application Note   (app note added 2/06)

AN-667: Up/Down Sequence of Supplies Using the ADM1060:  AN-667 - Analog Devices Application Note   (app note added 6/06)

AN-H51: Buck/Boost-Based LED Drivers using the HV9910:  Supertex Semiconductors (app note added 7/06)

AN-H51: Buck/Boost-Based LED Drivers using the HV9910:  Supertex Semiconductors (app note added 7/06)

Buck/Boost Charge Pump Regulator Powers White LEDs from a Wide 1.6 Volt to 5.5 Volt Input:  Maxim Application Note #1021 (app note added 7/03)

Buck/Boost Reference Design:  This reference design presents an alternative to the typical boost power regulator. A buck converter IC is used to generate a higher voltage needed by the white light LED power from a Ni-Cd battery. This circuit operates by turning the high switch on, connecting the battery voltage across the inductor. Once sufficient energy is stored in the inductor, the high side switch is turned off. The inductor current drives the switching node negative and energy is delivered through the low side into the output capacitor. This is essentially a lossless switching event. Also, since the high side and low side switches are MOSFET's, voltage drop can be very low as compared to a diode implementation so efficiency can be high. Regulation is achieved by monitoring the current through the LED with a current sense resistor and comparing it to an internal 0.45 volt reference within the converter IC. Current and thereby, illumination is varied by modifying the current sense resistor voltage. (added 3/05)

Buck/Boost Regulator Suits Battery Operation:  09/04/03 EDN Design Ideas  /  (added 1/05)  A buck/boost converter can step a voltage up or down. Such a converter is appropriate for battery-powered applications. One application derives a regulated 14.1V at 1A from 12V solar panels with 9 to 18V variation. In this type of battery application, efficiency is an important factor; hence, this design uses an inexpensive synchronous-rectifier-based MC33166/7 circuit....

Buck/Boost-Based LED Drivers using the HV9910:  Supertex Semiconductors (app note added 7/06)

Constant on Time Buck/Boost Regulator Converts a Positive Input to a Negative Output:  12/07/04 EDN Design Ideas  / (added 11/05)  Buck regulators find wide application as step-down regulators for converting large positive input voltages into a smaller positive output voltages. Figure 1 shows a simplified buck regulator that operates in continuous-conduction mode—that is, the inductor current always remains positive. The output voltage, VOUT, is equal to D×VIN, where D is the duty-cycle ratio of the buck switc...